化工学报2019，Vol.70Issue(7)：2766-2774,9.DOI:10.11949/0438-1157.20190078
乙烯基桥联有机硅膜的羧基化改性及反渗透性能研究
Carboxyl functionalization and reverse osmosis performance of ethenylene-bridged organosilica membranes
摘要
Abstract
Carboxyl functionalized bridged-type organosilica membranes were prepared via the thiol-ene click reaction between 1, 2-bis(triethoxysilyl)ethylene (BTESEthy) and mercaptosuccinic acid (MSA), using tubular α-Al2O3 microfiltration membranes as the supports. The membrane structure and surface properties were characterized by Fourier transform infrared spectroscopy (FT-IR), dynamic light scattering (DLS), intelligent gravimetric analyzer (IGA) and scanning electron microscopy (SEM). Quantum chemistry calculations show that the carboxylated modified silicone network has a denser pore structure and higher water affinity. The prepared BTESEthy-MSA membranes were applied to desalination by reverse osmosis. The reverse osmosis performance of BTESEthy-MSA membranes was systematically investigated. The experimental results showed that compared with the original BTESEthy membranes, both water permeability and salt rejection of the carboxyl functionalized BTESEthy-MSA membranes were improved. Meanwhile, the BTESEthy-MSA membranes exhibit superior hydrothermal stability and chlorine resistance. Moreover, the BTESEthy-MSA membranes exhibited high stability over long term reverse osmosis test of 250 h, and high water permeability of 3.2×10-13 m3/(m2·s·Pa) and NaCl rejections of>94.7%.关键词
膜/有机硅/羧基化/反渗透/脱盐/渗透率Key words
membrane/organosilica/carboxyl functionalization/reverse osmosis/desalination/permeability分类
化学化工引用本文复制引用
XU Rong,CHENG Xu,DENG Song,QI Lyu,REN Xiuxiu,ZHANG Qi,ZHONG Jing..乙烯基桥联有机硅膜的羧基化改性及反渗透性能研究[J].化工学报,2019,70(7):2766-2774,9.基金项目
国家自然科学基金项目(21406018) （21406018）
常州市科技计划项目(CJ20179053) （CJ20179053）
江苏省绿色催化材料与技术重点实验室项目(BM2012110) （BM2012110）
江苏省先进催化与绿色制造协同创新中心(常州大学) （常州大学）
